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首页> 外文期刊>International Journal of Machine Tools & Manufacture: Design, research and application >Prediction of frequency response function (FRF) of asymmetric tools from the analytical coupling of spindle and beam models of holder and tool
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Prediction of frequency response function (FRF) of asymmetric tools from the analytical coupling of spindle and beam models of holder and tool

机译：通过夹具和工具的主轴和梁模型的解析耦合预测非对称工具的频率响应函数（FRF）

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The prediction of chatter stability diagrams in milling requires accurate frequency response functions (FRF) at the tool - workpiece contact zone. Traditionally, the most accurate FRFs are best obtained through the experimental modal testing of each tool, which is costly. This paper presents analytical modeling and coupling procedures for spindle-holder-tool assemblies with asymmetric tools. Tools and holders are analytically modeled with continuous Timoshenko beams, while considering variation of the cross section geometry of the fluted sections and helix angle. While each solid part segments with varying geometry are assembled with rigid receptance coupling, the holder-spindle and tool-holder are coupled using contact stiffness and damping. The asymmetric cross sections of the helical end mills cause the variation of FRF as a function of the spindle's angular position. It is experimentally proven that the proposed method can predict the FRFs as the asymmetric tools rotate. (C) 2015 Elsevier Ltd. All rights reserved.
机译：铣削中颤振稳定性图的预测要求在工具-工件接触区具有精确的频率响应函数（FRF）。传统上，最精确的FRF是通过每种工具的实验模态测试获得的，这是昂贵的。本文介绍了带有不对称工具的主轴夹工具组装的分析建模和耦合过程。使用连续的Timoshenko梁对工具和刀座进行分析建模，同时考虑凹槽部分的横截面几何形状和螺旋角的变化。当每个具有可变几何形状的实心零件段通过刚性接纳联接器进行组装时，刀柄-主轴和刀柄均通过接触刚度和阻尼进行联接。螺旋立铣刀的不对称横截面导致FRF随主轴角位置而变化。实验证明，该方法可以预测非对称工具旋转时的FRF。 （C）2015 Elsevier Ltd.保留所有权利。

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